LG multi V ARUN Series Installation Manual page 34

Pipe connections between indoor and outdoor unit
3 Outdoor Units
Example : 6 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : Header branch
Ⓒ : Indoor Units
Ⓓ : Sealing
Ⓔ : Connection branch pipe
between Outdoor units:
ARCNN31
Ⓕ : Connection branch pipe
between Outdoor units:
ARCNN21
4 Outdoor Units
Example : 6 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : Header branch
Ⓒ : Indoor Units
Ⓓ : Sealing
Ⓔ : Connection branch pipe
between Outdoor units:
ARCNN41
Ⓕ : Connection branch pipe
between Outdoor units:
ARCNN31
Ⓖ : Connection branch pipe
between Outdoor units :
ARCNN21
Ú Total pipe length = A+a+b+c+d+e+f ≤ 1,000m
Longest pipe length
L
A+f ≤ 200m
Longest pipe length after 1st branch
l
f ≤ 40m
Difference in height(Outdoor Unit ÷ Indoor Unit)
H
H ≤ 110m
Difference in height (Indoor Unit ÷ Indoor Unit)
h
h ≤15m
Difference in height (Outdoor Unit ÷ Outdoor Unit)
h1
h1 ≤ 5m
• * : Assume equivalent piping length of Y branch to be 0.5m, that of header to be 1m, calculation purpose
• Indoor Unit should be installed at lower position than the header.
• Piping length from outdoor branch to outdoor unit ≤ 10m, equivalent length : max 13m
(for 22HP or more)
34 Outdoor Unit
Slave2
Slave1
10m or
less
Branch pipe can not be used after header
Slave3
Slave2
G G
F F
10m or
E E
less
Branch pipe can not be used after header
* Equivalent pipe length
A+f ≤ 225m
Master
ODU Capacity
Master ≥ Slave1 ≥ Slave2
L 200m
Slave1
Master
ODU Capacity
Master ≥ Slave1 ≥ Slave2 ≥ Slave3
L 200m
WARNING
Pipe length after header branching
(a~f)
It is recommended that difference in
length of the pipes connected to the
Indoor Units is minimized.
Performance difference between
Indoor Units may occur.
40m
40m